Exterior surface configuration of vehicular taillight



FIG. 1 is a perspective view of an exterior surface configuration of avehicular taillight showing my present design;

FIG. 2 is a front view thereof;

FIG. 3 is a right view thereof; and,

FIG. 4 is a top plan view thereof.

I claim, the ornamental design for an exterior surface configuration ofa vehicular taillight, as shown and described.